Uniaxial Tensile Creep Behavior of Two Types of Polypropylene Fiber Reinforced Concrete

  • Rutger Vrijdaghs
  • Marco di Prisco
  • Lucie Vandewalle
Conference paper

Abstract

Structural polymeric macrofibers can be added to concrete to increase the residual capacity after matrix cracking. Polymeric fiber reinforced concrete (PFRC) can be designed according to the Model Code 2010, but no design guidelines are given to take creep behavior into account. In this work, the results of a multiscale experimental campaign into the crack-widening mechanisms of PFRC are detailed. Two different commercially available polypropylene fibers from the same manufacturer are tested. In the tests, individual fibers are subjected to long-term loading and the elongations are recorded. Furthermore, precracked PFRC cores are tested in a uniaxial tensile creep test at two load levels. The fiber creep tests highlight significant differences between the two fibers: the creep coefficient can differ an order of magnitude at similar load ratios. However, despite the much better performance at the individual fiber level, the FRC creep behavior does not vary to that degree. By comparing the single fiber performance with the FRC creep, it is found that pull-out creep and rupture can offset superior fiber creep performance.

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  • Rutger Vrijdaghs
    • 1
  • Marco di Prisco
    • 2
  • Lucie Vandewalle
    • 1
  1. 1.Department of Civil EngineeringKU LeuvenLeuvenBelgium
  2. 2.Department of Structural EngineeringPolitecnico di MilanoMilanItaly

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